What is the
difference between fresh-packed pickles and fermented
pickles?

In fresh-pack pickles, acetic acid is added to
vegetables or fruits in the form of vinegar. Examples of
fresh-pack pickle products are bread and butter pickles
and corn relish. Fermented pickles, also known as brined
pickles contain lactic acid produced by bacterial
fermentation. Brined dill pickles and sauerkraut are
fermented pickle products.